多径信号载波相干解调RAKE接收机

北京邮电大学学报 ›› 2010, Vol. 33 ›› Issue (3): 30-33.doi: 10.13190/jbupt.201003.30.fuhy

傅海阳,贾向东,郑建光,戴振华

FU Hai-yang; JIA Xiang-dong; ZHENG Jian-guang; DAI Zhen-hua

(College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China)

Received:2009-09-17 Revised:2009-11-20 Online:2010-06-28 Published:2010-05-14

摘要：

传统RAKE接收机(CLRAKE)由于不同路径载波之间存在无法准确估计的相位差，将导致多径信

号的功率利用率大幅下降. 针对这一缺陷，提出一种在载波上实现多径分离, 并分别对多径

信号实现载波相干解调的新型相干RAKE接收机（CORAKE）. 该CORAKE对各径信号的接收都是

相干解调，三径本地载波分别与相对应的三径接收信号载波相位差均为0，消除了各径载波间

的相位差对接收性能的影响. 仿真结果表明，CORAKE具有更好的接收信噪比增益.

关键词: 多径信号, 相位差, RAKE接收机, 相干解调

Abstract:

Can not be accurately estimated，and existed in signal carriers of different paths, the Phase

difference leads to significant drop of power utilization rate of multi-path signals received by conventional

RAKE receiver (CLRAKE). A new RAKE receiver (CORAKE) that can separate multi-path signals in

carriers of different paths and implement carrier coherent demodulation is proposed. When received by

CORAKE, signal of each path is coherently demodulated. Phase difference between the local carrier and

carriers of corresponding received signals is zero, so that the defect of receiving due to the phase difference

among carries can be removed. Simulation shows that the CORAKE obtains better receiving signal

to noise ratio (SNR) gain.

Key words: multi-path signal, phase difference, RAKE receiver, coherent demodulation

傅海阳贾向东郑建光戴振华. 多径信号载波相干解调RAKE接收机[J]. 北京邮电大学学报, 2010, 33(3): 30-33.

FU Hai-yang; JIA Xiang-dong; ZHENG Jian-guang; DAI Zhen-hua.

RAKE Receiver with Carrier Coherent Demodulation for MultiPath Signals [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2010, 33(3): 30-33.

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